<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			.box{
				width: 300px;
				height: 300px;
				line-height: 300px;
				text-align: center;
				border: 1px solid #000;
			}
			
			.box img{
				width: 100px;
				vertical-align: middle;
			}
		</style>
	</head>
	<body>
		<div class="box">
			<img src="../../第一周/day05/day05作业/预习后完成/学成在线资料/images/btn.png" >
		</div>
	</body>
</html>
